Reference Data Rate Center Directory ALLERTON, IA Rate Center ALLERTON — IA Data last updated: March 10, 2026 LATA 632 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.70695478437127, -93.36737302635768 Area Codes 641 Top Carriers Carrier OCN NXX Count GRAND RIVER MUTUAL TEL CO 1888 1
